US3145227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic phosphine oxides and methods of preparing same
Assignee: Wyeth Holdings LLC
•
Filing: 1961-06-14
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Granted: 1964-08-18
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Expires: 1981-06-14
Abstract
No abstract record available.
Inventors
- 👤 Grayson Martin
- 👤 Keough Patricia Tarpey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2608; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/50; C07F9/53; C07F9/5329
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A PROCESS WHICH COMPRISES REACTING AN ORGANOPHOSPHOROUS COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
11 words
A PROCESS WHICH COMPRISES REACTING AN ORGANOPHOSPHOROUS COMPOUND OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |